High voltage generator



Dec. 5, 1939. N. E. LINDENBLAD HIGH VOLTAGE GENERATOR Filed Feb. 1o, 1957 D A 4 L am m mmf, v| @K s L MNl Y B ATTORNEY Patented Dec. 5, 1939l HIGH VOLTAGE GENERATOR Nils E. Lindenblad, Port Jeerson, N. Y., assignor to Radio Corporation of America, a corporation of Delaware Applicant February 1o, 1937. semi No. 124,983

14 Claims.

ages at high energy levels.

This invention is a continuation in part of my copending application Serial No. 684,328, filed Aug. 9,1933, a division 0f which Serial No. 4,475, med Feb. 1, 1935, m8.-

tured into Pat. #2,070,972, patented Feb. 16, 1937, to which a second ilxed element is added to reduce corona discharge when the generating system is employed for producing extremely high potentials.

This application is specincally directed to a further improvement of a rotor system wherein an induction principle is combined with centrifugal force. The rotor system has a corona shield interposed between the fixed and movable elements to reduce corona.

The second iixed element is in the form of a split corona shield interposed between the iixed and rotating element to reduce corona effects when the generator is operated at extremely high voltages In one way of carrying out my invention for the generation of high direct current voltages, I

charge metallic units, preferably particles di' metal, by actual 'conductive contact with a direct current source.

Then, by moving the particles away from the source, the voltages of the charges thereon are increased, in a manner which will be explained more fully hereinafter, and the charges can then be ultimately deposited upon a low voltage gradient-section of a cha vice or container.

rse-storing deseparated from a chargeable medium which may be a solid, a liquid or a gas, and, by the use of a point discharge electrode system connected to a direct current source, or preferably to ground. ionization or corona; is caused to take place through and/or about the chargeable medium. The charged medium is then moved or carried to a lowergradient area on a chargeable element, the high voltage surface of which is brought up to an exceedingly high voltage by the continued deposits from the charged medium.

A further and more specific object vof my present invention is .to provide systems which utilize my improved contact and induction principles for charging solid mediums such as belts and discs, for charging liquids such as oil and and for ohrginl Bases.

n suspension,

The invention will best be understood by referring to the accompanying drawing, in which:

Fig. 1 is a perspective view partly in section of a disc system;

Fig. 2 is a perspective view partly in section of 5 a disc system, similar to Fig. 1, except that the lower disc is of insulating material.

Referring now in detail to Fig. 1, a metallic cylindrical tube I is grounded through a conductor 2, which conductor may be in the alter- 10 native, if desired, connected to a relatively high source of potential. A mixture 3 of metallic powder and some insulating material, such as bronze powder and oil, is caused to fall to the surface of the rotating disc 4. 'I'he metallic par- 18 ticles are charged up and driven out by centrifugal force to the outer metallic plate or annular collector 5. Disc 4 is rapidly rotated by a shaft 6. However, this shaft is insulatedly supported` upon the motor shaft 'I by insulation block 8, 20 so that the source of potential may be impressed upon the shaft by brush 9, which potential turn manifests itself upon metallic disc 4. Centrifugal force will therefore drive the oil and metal powder mixture horizontally between the rotating 25 disc 4 and the stationary disc I0, into the interior of the shell 5, having an outlet I2 throughwhich the oil may fall into a` suitable piping system I3 for passage again into pipe I. The oil and metallic mixture becoming charged up by 30 the conductor will, in turn, deposit its charge on the interior surface of the shell 5, as a result of which higher voltages may be generated in this system, as compared with the arrangement shown in my earlier applications, andias a result there- 35 of, there will be a tendency for a corona discharge to be built up. To overcome the disastrous effects which may result from the corona, a second metallic element is interposed between the xed and rotating elements. 'I'his added ele- 40 ment is in the form of Ytwo metallic rings I4 and I5, which are insulatedly supported by member 5 and insulated therefrom by insulating rings IB and I'I. 'Ihe rings .I4 and I5 may be electrically` connected to the stationary disc I0 by 45 metallic strips II, or any other suitable means, if desired, may be connected to the rotating discs l or 20 by suitable brushes (not shown) In the arrangement shown in Fig. 2*, the lower disc 2li is provided with an upper surface 2| of 5o insulating material. The oil from pipe I is preferably in this case pure oil. High voltages impressed upon shaft 6 through brush 9 will cause corona discharge at points 22 carried by the up per metallic plate III. The insulating material MZI,

however, will prevent short-circuiting' of the corona discharge to the metallic plate 20. In this way, still higher charges 'for the annular collector 5 may be obtained. The system shown in Fig. 2, therefore, utilizes for charging the liquid mdium an induction principle. l

Various other changes will readily Suggest themselves to those skilled in the art in carrying out the principles of my present invention. Therefore, my present invention is not to be considered limited by the various illustrations which are given merely as specific examples, but is to charging said liquid, and means including said able surfaces, a metallic 'ring surrounding said fixed and movable surfaces and said corona shield, means foiifeeding a liquid containing metallic powder on said movable surface, means for Imetallic ring for discharging said liquid after being thrown out from saidl movable surface' by centrifugal force.

3. A. high voltage generator comprising a fixed surface and a movable, metallized disc-like-sury' face, a-metallic member surrounding said fixed and movable surfaces forming a corona shield, m'eans for feeding a liquid on said movable surface, means for charging said liquid, and means for discharging saidliquid after being. thrown out from said movablefsurface by centrifugal force.

4. A high voltage generator comprising a fixed ,surface and a pair of movable discs, one of said discs being of insulating material and the other disc being "of conducting -material and fastened to an insulating hub located on a rotatable shaft for moving said discs, a corona shield comprising a pair of metallic rings surrounding said discs, another ring member outside said pair of metallic rings, means for feeding a liquid on thel surface of 'said movable disc, means for chargingv said liquid,- and means for discharging said liquid after bei "nir u fr 1 ns own o 't om sa' d disc. by centrifugal atively fixed surface and a movable surface, a metallic corona shield surrounding said fixed andforce.

5: Ahiglh voltage generator comprisinga fixed' and a movable disc, said ^movable disc being formed of two parts, one part being'of conductive materia and the other of insmatmg materiau, the portion of said disc which is of conducting matev rial being fastened to an insulating 4hub located on av rotatable shaft for moving said disc, a Plurality of rings surrounding the periphery of said discs, and means for feeding liquid containing metallic vparticles between said discs by centrifugal force so as to impinge the inner surface of one said rings. f 6.- Ahigh voltage generator comprising a relatively fixed surface and a movable surface, a ring surrounding the-periphery of said movable surface, a. second ringA terposed between the periphery of lsaid movabl surface and said rst mentioned ring to act as a corona shield, means for feeding' a. Aliquid o n said movable surface,

means for charging said liquid, and means for discharging said liquid after being thrown out from said movable surface by centrifugal force.

7. A high voltage generator comprising a relatively fixed surface and a movable surface, a ring surrounding the periphery of said movable surface, a second ring insulatedly supported by said first mentioned ring and interposed between the periphery of said movable surface and said rst mentioned ring to act as a corona shield, means for feeding` a liquid on said movable surface, means for charging said liquid, and means for discharging said liquidafter being thrown out from said movable surface by centrifugal force.

8. A high voltage generator comprising a relatively fixed surface and a movable surface, a ring surrounding the periphery of said movable surface, a pair of rings interposed between the periphery of said movable surface and said first `mentioned ring to act as a corona shield, means for feeding a liquid on said movable surface, means for charging said liquid, and means including said first mentioned ring for discharging said liquid after being thrown out from said movable surface by centrifugal force.

9. A high voltage generator comprising a fixed and a movable surface, a corona shield surround- "ing the periphery of ,said movable surface, a metallic ring surrounding said corona, shield, means for feeding a liquid on said movable surface, means for charging said liquid, and means for discharging saiddiquid after being thrown out from said movable surface by centrifugal force.

10. A high voltage generator comprising a relatively fixed metallic surface and a movable insulating surface, a corona shield surrounding the periphery of said movable insulating surface, a metallic ring surrounding said corona shield, means for feeding a liquid on said movable srface, means for charging said liquid, and means including said metallic ring for discharging said liquid after being thrown out from said movable liquid, and .means for discharging said liquid x after .being thrown" out from. said movable surface by centrifugal force.

1,2. A high voltage generator `comprising a relmeans for. charging said liquid, and means for4 discharging said liquid after being thrown outv from said movable surface by centrifugal force.

14. A high voltage generator comprising` a iixed and a movable surface, said movable surface being dividedinto two parts, one Dart being of conductive materialand vother part of insulating niaterial, the portion of said movable surface which is of conducting material being fastened to an insulating hub located on a rotatable shaft for moving said surface. said fixed surface having a plurality of discharge points facing the insulating part of said movable surface, a corona shield surrotmding the periphery of said movable surface,

a metallic ring surrounding said corona shield.

means for feeding a. liquid on said movable surface, means for charging said liquid, and means for discharging said liquid after being thrown out from said movable surface by centrifugalforce. [n 

